mbufs.c revision 200462 
1/*-
2 * Copyright (c) 1980, 1992, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35
36__FBSDID("$FreeBSD: head/usr.bin/systat/mbufs.c 200462 2009-12-13 03:14:06Z delphij $");
37
38#ifdef lint
39static const char sccsid[] = "@(#)mbufs.c	8.1 (Berkeley) 6/6/93";
40#endif
41
42#include <sys/param.h>
43#include <sys/types.h>
44#include <sys/mbuf.h>
45#include <sys/sysctl.h>
46
47#include <errno.h>
48#include <stdlib.h>
49#include <string.h>
50#include <paths.h>
51
52#include "systat.h"
53#include "extern.h"
54
55static struct mbstat *mbstat;
56static long *m_mbtypes;
57static short nmbtypes;
58
59static struct mtnames {
60	short mt_type;
61	const char *mt_name;
62} mtnames[] = {
63	{ MT_DATA, 	"data"},
64	{ MT_HEADER,	"headers"},
65	{ MT_SONAME,	"socknames"},
66	{ MT_CONTROL,	"control"},
67	{ MT_OOBDATA,	"oobdata"}
68};
69#define	NNAMES	(sizeof (mtnames) / sizeof (mtnames[0]))
70
71WINDOW *
72openmbufs(void)
73{
74	return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
75}
76
77void
78closembufs(WINDOW *w)
79{
80	if (w == NULL)
81		return;
82	wclear(w);
83	wrefresh(w);
84	delwin(w);
85}
86
87void
88labelmbufs(void)
89{
90	wmove(wnd, 0, 0); wclrtoeol(wnd);
91	mvwaddstr(wnd, 0, 10,
92	    "/0   /5   /10  /15  /20  /25  /30  /35  /40  /45  /50  /55  /60");
93}
94
95void
96showmbufs(void)
97{
98	int i, j, max, idx;
99	u_long totmbufs;
100	char buf[10];
101	const char *mtname;
102
103	totmbufs = mbstat->m_mbufs;
104
105	/*
106	 * Print totals for different mbuf types.
107	 */
108	for (j = 0; j < wnd->_maxy; j++) {
109		max = 0, idx = -1;
110		for (i = 0; i < wnd->_maxy; i++) {
111			if (i == MT_NOTMBUF)
112				continue;
113			if (i >= nmbtypes)
114				break;
115			if (m_mbtypes[i] > max) {
116				max = m_mbtypes[i];
117				idx = i;
118			}
119		}
120		if (max == 0)
121			break;
122
123		mtname = NULL;
124		for (i = 0; i < (int)NNAMES; i++)
125			if (mtnames[i].mt_type == idx)
126				mtname = mtnames[i].mt_name;
127		if (mtname == NULL)
128			mvwprintw(wnd, 1+j, 0, "%10d", idx);
129		else
130			mvwprintw(wnd, 1+j, 0, "%-10.10s", mtname);
131		wmove(wnd, 1 + j, 10);
132		if (max > 60) {
133			snprintf(buf, sizeof(buf), " %d", max);
134			max = 60;
135			while (max--)
136				waddch(wnd, 'X');
137			waddstr(wnd, buf);
138		} else
139			while (max--)
140				waddch(wnd, 'X');
141		wclrtoeol(wnd);
142		m_mbtypes[idx] = 0;
143	}
144
145	/*
146	 * Print total number of free mbufs.
147	 */
148	if (totmbufs > 0) {
149		mvwprintw(wnd, 1+j, 0, "%-10.10s", "Mbufs");
150		if (totmbufs > 60) {
151			snprintf(buf, sizeof(buf), " %lu", totmbufs);
152			totmbufs = 60;
153			while(totmbufs--)
154				waddch(wnd, 'X');
155			waddstr(wnd, buf);
156		} else {
157			while(totmbufs--)
158				waddch(wnd, 'X');
159		}
160		wclrtoeol(wnd);
161		j++;
162	}
163	wmove(wnd, 1+j, 0); wclrtobot(wnd);
164}
165
166int
167initmbufs(void)
168{
169	size_t len;
170
171	len = sizeof *mbstat;
172	if ((mbstat = malloc(len)) == NULL) {
173		error("malloc mbstat failed");
174		return 0;
175	}
176	if (sysctlbyname("kern.ipc.mbstat", mbstat, &len, NULL, 0) < 0) {
177		error("sysctl retrieving mbstat");
178		return 0;
179	}
180	nmbtypes = mbstat->m_numtypes;
181	if ((m_mbtypes = calloc(nmbtypes, sizeof(long *))) == NULL) {
182		error("calloc m_mbtypes failed");
183		return 0;
184	}
185
186	return 1;
187}
188
189void
190fetchmbufs(void)
191{
192	size_t len;
193
194	len = sizeof *mbstat;
195	if (sysctlbyname("kern.ipc.mbstat", mbstat, &len, NULL, 0) < 0)
196		printw("sysctl: mbstat: %s", strerror(errno));
197}
198